Powers:Amelia Voght has the power of transsubstantiation, enabling her to convert matter into a mentally responsive, psionic vapor at will. This mist is Amelia's own natural state after her powers manifested, and she is capable of transforming herself or any person or object in her line-of-sight into this state. Loose mist is virtually insubstantial, so Amelia can use this power to avoid injury. She can control the flow of the vapor through the air, allowing her to fly, squeeze herself through tight passages, or move objects about -- she could pull a person out from under a mob attacking them by dispersing and reforming them nearby, or steal her opponents' weapons by vaporizing them into their hands and bringing them to her own. Voght's mist can also be transported through the astral plane, allowing her to employ her powers for long range teleportation. She is able to transport herself and anything else she transsubstantiates across the surface of the globe in an instant, or to and from orbit around the planet. She can teleport with cargo, or send objects to a new location within traveling with them, providing she can visualize the new location in her mind. On certain occasions, Voght even demonstrated the ability to summon distant people to herself by teleportation, visualizing wherever the person is at the moment, seeing them converted into mist, and then bringing that mist into her presence to be reformed.

Bio:Amelia was a nurse who cared for Charles Xavier after his legs were first injured. Stationed in Tibet, Amelia was glad to see another American and her positive and friendly attitude helped Xavier to get over the depression he developed when his legs were injured. At first their relationship was professional, but it soon became romantic. They left Tibet together and Amelia returned with Xavier to the United States. Xavier, also a mutant, had encountered Magneto and the Shadow King and was developing a machine called Cerebro to track mutants, hoping to protect and educate them, so they wouldn't turn into a threat. Amelia found the plans and thought that Xavier was developing the machine to hunt down and exterminate mutants. She revealed herself as a mutant and attacked him, only stopped when Xavier revealed his own mutant powers. This link strengthened their relationship even more, but over time they both developed different stances on human-mutant interaction. Xavier wanted co-existence with the humans, while Amelia thought it was best for mutants to stay underground. When Xavier brought Scott Summers to his mansion for training, Amelia left him, telling him that his plans for the X-Men would doom all mutants. Xavier involuntarily used his telepathy to convince her otherwise, but managed to stop himself. Amelia noticed as well and felt betrayed.

She would stay hidden for the next few years, but when human-mutant relationships deteriorated, she was recruited by Fabian Cortez and became a member of the second lineup of the Acolytes, followers of Magneto, who she had met with Xavier years before. As one of the older and more experienced mutants, she was given a position of seniority within the group, even though she didn't agree with some of the Acolytes' more extreme policies, like the killing of humans. Over the years she would support the Acolytes and Magneto, but she would also try to limit casualties and gave limited aid to the X-Men and other superheroes like Quicksilver who opposed them.

She eventually became disillusioned with the Acolytes' extremist stance and left the group.

Amelia is also one of a handful of mutants to retain their powers following the events of House of M.